[Trombone-l] Fw: Valve section tuning slide

[Keith Marr]

This reminds me of the time I got a repair tech to make an extension to the
D valve of my G trombone to lower the valve to C. It's just two tubes linked
in parallel by a coupla braces and it looks as though the two tubes are
 entirely the same, but it will only work one way round.

 Ain't acoustics a wonderful thing!

 Cheers!

 Keith in Bb/F/D
 Bass Trombone
St Albans Symphony Orchestra
North Herts Big Band